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<?php |
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namespace Yiisoft\Validator\Rule; |
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use Yiisoft\Validator\Result; |
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use Yiisoft\Validator\Rule; |
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/** |
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* EmailValidator validates that the attribute value is a valid email address. |
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*/ |
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class Email extends Rule |
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{ |
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/** |
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* @var string the regular expression used to validateValue the attribute value. |
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* @see http://www.regular-expressions.info/email.html |
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*/ |
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private $pattern = '/^[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$/'; |
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/** |
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* @var string the regular expression used to validateValue email addresses with the name part. |
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* This property is used only when [[allowName]] is true. |
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* @see allowName |
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*/ |
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private $fullPattern = '/^[^@]*<[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?>$/'; |
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/** |
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* @var bool whether to allow name in the email address (e.g. "John Smith <[email protected]>"). Defaults to false. |
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* @see fullPattern |
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*/ |
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private $allowName = false; |
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/** |
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* @var bool whether to check whether the email's domain exists and has either an A or MX record. |
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* Be aware that this check can fail due to temporary DNS problems even if the email address is |
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* valid and an email would be deliverable. Defaults to false. |
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*/ |
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private $checkDNS = false; |
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/** |
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* @var bool whether validation process should take into account IDN (internationalized domain |
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* names). Defaults to false meaning that validation of emails containing IDN will always fail. |
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* Note that in order to use IDN validation you have to install and enable `intl` PHP extension, |
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* otherwise an exception would be thrown. |
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*/ |
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private $enableIDN = false; |
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private $message; |
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public function validateValue($value): Result |
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{ |
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$result = new Result(); |
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if (!is_string($value)) { |
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$valid = false; |
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} elseif (!preg_match('/^(?P<name>(?:"?([^"]*)"?\s)?)(?:\s+)?(?:(?P<open><?)((?P<local>.+)@(?P<domain>[^>]+))(?P<close>>?))$/i', $value, $matches)) { |
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$valid = false; |
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} else { |
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if ($this->enableIDN) { |
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$matches['local'] = $this->idnToAscii($matches['local']); |
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$matches['domain'] = $this->idnToAscii($matches['domain']); |
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$value = $matches['name'] . $matches['open'] . $matches['local'] . '@' . $matches['domain'] . $matches['close']; |
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} |
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if (strlen($matches['local']) > 64) { |
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// The maximum total length of a user name or other local-part is 64 octets. RFC 5322 section 4.5.3.1.1 |
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// http://tools.ietf.org/html/rfc5321#section-4.5.3.1.1 |
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$valid = false; |
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} elseif (strlen($matches['local'] . '@' . $matches['domain']) > 254) { |
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// There is a restriction in RFC 2821 on the length of an address in MAIL and RCPT commands |
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// of 254 characters. Since addresses that do not fit in those fields are not normally useful, the |
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// upper limit on address lengths should normally be considered to be 254. |
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// |
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// Dominic Sayers, RFC 3696 erratum 1690 |
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// http://www.rfc-editor.org/errata_search.php?eid=1690 |
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$valid = false; |
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} else { |
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$valid = preg_match($this->pattern, $value) || $this->allowName && preg_match($this->fullPattern, $value); |
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if ($valid && $this->checkDNS) { |
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$valid = checkdnsrr($matches['domain'] . '.', 'MX') || checkdnsrr($matches['domain'] . '.', 'A'); |
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} |
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} |
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} |
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if ($valid === false) { |
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$result->addError($this->message ?? $this->formatMessage('{attribute} is not a valid email address.')); |
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} |
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return $result; |
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} |
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private function idnToAscii($idn) |
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{ |
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return idn_to_ascii($idn, 0, INTL_IDNA_VARIANT_UTS46); |
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} |
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/** |
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* @param bool $allowName |
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* |
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* @return Email |
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*/ |
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public function allowName(bool $allowName): self |
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{ |
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$this->allowName = $allowName; |
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return $this; |
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} |
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/** |
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* @param bool $checkDNS |
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* |
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* @return Email |
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*/ |
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public function checkDNS(bool $checkDNS): self |
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{ |
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$this->checkDNS = $checkDNS; |
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return $this; |
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} |
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/** |
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* @param bool $enableIDN |
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* |
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* @return Email |
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*/ |
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public function enableIDN(bool $enableIDN): self |
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{ |
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if ($enableIDN && !function_exists('idn_to_ascii')) { |
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throw new \RuntimeException('In order to use IDN validation intl extension must be installed and enabled.'); |
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} |
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$this->enableIDN = $enableIDN; |
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return $this; |
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} |
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/** |
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* @param string $message |
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* |
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* @return $this |
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*/ |
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public function message(string $message) |
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{ |
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$this->message = $message; |
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return $this; |
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} |
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} |
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yiisoft /
validator
